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Merger by Absorption Between Telecom Argentina and Cablevision S.A. - Capital Stock (Details) - shares | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Jun. 29, 2017 | Jan. 01, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Equity |  |  |  |  |
Number of shares outstanding |  |  | 969,159,605 |  |
Number of shares in entity held by entity or by its subsidiaries or associates |  |  | 15,221,373 | 15,221,373 | 15,221,373
Number of shares issued |  |  | 984,380,978 |  |
Major ordinary share transactions |  |  |  |  |
Equity |  |  |  |  |
Number of shares outstanding |  | 2,153,688,011 |  |  |
Number of shares in entity held by entity or by its subsidiaries or associates |  | 15,221,373 |  |  |
Number of shares issued |  | 2,168,909,384 |  |  |
Cablevision Holding S.A. |  |  |  |  |
Equity |  |  |  |  |
Ownership interest in acquirer held before merger | 55.00% |  |  |  |
Telecom Argentina |  |  |  |  |
Equity |  |  |  |  |
Ownership interest in acquirer held before merger | 45.00% |  |  |  |
Class "A" |  |  |  |  |
Equity |  |  |  |  |
Number of shares outstanding |  |  | 340,994,852 |  |
Number of shares issued |  |  | 340,994,852 |  |
Class "A" | Major ordinary share transactions |  |  |  |  |
Equity |  |  |  |  |
Number of shares outstanding |  | 683,856,600 |  |  |
Number of shares issued |  | 683,856,600 |  |  |
Class "A" | Preliminary Merger Agreement and the Final Merger Agreement |  |  |  |  |
Equity |  |  |  |  |
Number of shares issued |  |  | 342,861,748 |  |
Class "A" | Preliminary Merger Agreement and the Final Merger Agreement | Fintech |  |  |  |  |
Equity |  |  |  |  |
Number of shares issued |  | 342,861,748 |  |  |
Class "B" |  |  |  |  |
Equity |  |  |  |  |
Number of shares outstanding |  |  | 627,930,005 |  |
Number of shares in entity held by entity or by its subsidiaries or associates |  |  | 15,221,373 |  |
Number of shares issued |  |  | 643,151,378 |  |
Class "B" | Major ordinary share transactions |  |  |  |  |
Equity |  |  |  |  |
Number of shares outstanding |  | 627,930,005 |  |  |
Number of shares in entity held by entity or by its subsidiaries or associates |  | 15,221,373 |  |  |
Number of shares issued |  | 643,151,378 |  |  |
Class "C" |  |  |  |  |
Equity |  |  |  |  |
Number of shares outstanding |  |  | 234,748 |  |
Number of shares issued |  |  | 234,748 |  |
Class "C" | Major ordinary share transactions |  |  |  |  |
Equity |  |  |  |  |
Number of shares outstanding |  | 234,748 |  |  |
Number of shares issued |  | 234,748 |  |  |
Class "D" | Major ordinary share transactions |  |  |  |  |
Equity |  |  |  |  |
Number of shares outstanding |  | 841,666,658 |  |  |
Number of shares issued |  | 841,666,658 |  |  |
Class "D" | Preliminary Merger Agreement and the Final Merger Agreement |  |  |  |  |
Equity |  |  |  |  |
Number of shares issued |  |  | 841,666,658 |  |
Class "D" | Preliminary Merger Agreement and the Final Merger Agreement | Cablevision Holding S.A. |  |  |  |  |
Equity |  |  |  |  |
Number of shares issued |  | 406,757,183 |  |  |
Class "D" | Preliminary Merger Agreement and the Final Merger Agreement | VLG Argentina LLC |  |  |  |  |
Equity |  |  |  |  |
Number of shares issued |  | 434,909,475 |  |  |

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